Java生成二维码可添加logo和文字功能

Java生成二维码可添加logo和文字功能

废话不多说，直接给大家贴代码了，具体代码如下所示：

package com.luo.wctweb.util;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

import javax.imageio.ImageIO;

import javax.servlet.http.HttpServletRequest;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.WriterException;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import com.lz.lsf.util.Base64;

/** * @Description: (二维码) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */

public class ZXingCode {

private static final int QRCOLOR = 0xFF000000; //默认是黑色

private static final int BGWHITE = 0xFFFFFFFF; //背景颜色

public static void main(String[] args) throws WriterException

{

try

{

getLogoQRCode("https://baidu.com/", null, "跳转到百度的二维码");

}

catch (Exception e)

{

e.printStackTrace();

}

}

/** * 生成带logo的二维码图片 * * @param qrPic * @param logoPic */

public static String getLogoQRCode(String qrUrl,HttpServletRequest request,String productName)

{

// String filePath = request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png";

//filePath是二维码logo的路径，但是实际中我们是放在项目的某个路径下面的，所以路径用上面的，把下面的注释就好

String filePath = "C:/Users/luoguohui/Desktop/78310a55b319ebc4fa3aef658126cffc1f17168f.jpg"; //TODO

String content = qrUrl;

try

{

ZXingCode zp = new ZXingCode();

BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());

return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName);

}

catch (Exception e)

{

e.printStackTrace();

}

return null;

}

/** * 给二维码图片添加Logo * * @param qrPic * @param logoPic */

public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName)

{

try

{

/** * 读取二维码图片，并构建绘图对象 */

BufferedImage image = bim;

Graphics2D g = image.createGraphics();

/** * 读取Logo图片 */

BufferedImage logo = ImageIO.read(logoPic);

/** * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码 */

int widthLogo = logo.getWidth(null)>image.getWidth()*3/10?(image.getWidth()*3/10):logo.getWidth(null),

heightLogo = logo.getHeight(null)>image.getHeight()*3/10?(image.getHeight()*3/10):logo.getWidth(null);

/** * logo放在中心 */

int x = (image.getWidth() - widthLogo) / 2;

int y = (image.getHeight() - heightLogo) / 2;

/** * logo放在右下角 * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */

//开始绘制图片

g.drawImage(logo, x, y, widthLogo, heightLogo, null);

// g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);

// g.setStroke(new BasicStroke(logoConfig.getBorder()));

// g.setColor(logoConfig.getBorderColor());

// g.drawRect(x, y, widthLogo, heightLogo);

g.dispose();

//把商品名称添加上去，商品名称不要太长哦，这里最多支持两行。太长就会自动截取啦

if (productName != null && !productName.equals("")) {

//新的图片，把带logo的二维码下面加上文字

BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);

Graphics2D outg = outImage.createGraphics();

//画二维码到新的面板

outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);

//画文字到新的面板

outg.setColor(Color.BLACK);

outg.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号

int strWidth = outg.getFontMetrics().stringWidth(productName);

if (strWidth > 399) {

// //长度过长就截取前面部分

// outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字

//长度过长就换行

String productName1 = productName.substring(0, productName.length()/2);

String productName2 = productName.substring(productName.length()/2, productName.length());

int strWidth1 = outg.getFontMetrics().stringWidth(productName1);

int strWidth2 = outg.getFontMetrics().stringWidth(productName2);

outg.drawString(productName1, 200 - strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 );

BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);

Graphics2D outg2 = outImage2.createGraphics();

outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);

outg2.setColor(Color.BLACK);

outg2.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号

outg2.drawString(productName2, 200 - strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2 + 5 );

outg2.dispose();

outImage2.flush();

outImage = outImage2;

}else {

outg.drawString(productName, 200 - strWidth/2 , image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); //画文字

}

outg.dispose();

outImage.flush();

image = outImage;

}

logo.flush();

image.flush();

ByteArrayOutputStream baos = new ByteArrayOutputStream();

baos.flush();

ImageIO.write(image, "png", baos);

//二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉

//可以看到这个方法最终返回的是这个二维码的imageBase64字符串

//前端用 其中${imageBase64QRCode}对应二维码的imageBase64字符串

ImageIO.write(image, "png", new File("C:/Users/luoguohui/Desktop/TDC-" + new Date().getTime() + "test.png")); //TODO

String imageBase64QRCode = Base64.byteArrayToBase64(baos.toByteArray());

baos.close();

return imageBase64QRCode;

}

catch (Exception e)

{

e.printStackTrace();

}

return null;

}

/** * 构建初始化二维码 * * @param bm * @return */

public BufferedImage fileToBufferedImage(BitMatrix bm)

{

BufferedImage image = null;

try

{

int w = bm.getWidth(), h = bm.getHeight();

image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

for (int x = 0; x < w; x++)

{

for (int y = 0; y < h; y++)

{

image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);

}

}

}

catch (Exception e)

{

e.printStackTrace();

}

return image;

}

/** * 生成二维码bufferedImage图片 * * @param content * 编码内容 * @param barcodeFormat * 编码类型 * @param width * 图片宽度 * @param height * 图片高度 * @param hints * 设置参数 * @return */

public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map hints)

{

MultiFormatWriter multiFormatWriter = null;

BitMatrix bm = null;

BufferedImage image = null;

try

{

multiFormatWriter = new MultiFormatWriter();

// 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数

bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);

int w = bm.getWidth();

int h = bm.getHeight();

image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

// 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色

for (int x = 0; x < w; x++)

{

for (int y = 0; y < h; y++)

{

image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);

}

}

}

catch (WriterException e)

{

e.printStackTrace();

}

return image;

}

/** * 设置二维码的格式参数 * * @return */

public Map getDecodeHintType()

{

// 用于设置QR二维码参数

Map hints = new HashMap();

// 设置QR二维码的纠错级别（H为最高级别）具体级别信息

hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

// 设置编码方式

hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

hints.put(EncodeHintType.MARGIN, 0);

hints.put(EncodeHintType.MAX_SIZE, 350);

hints.put(EncodeHintType.MIN_SIZE, 100);

return hints;

}

}

class LogoConfig

{

// logo默认边框颜色

public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;

// logo默认边框宽度

public static final int DEFAULT_BORDER = 2;

// logo大小默认为照片的1/5

public static final int DEFAULT_LOGOPART = 5;

private final int border = DEFAULT_BORDER;

private final Color borderColor;

private final int logoPart;

/** * Creates a default config with on color {@link #BLACK} and off color * {@link #WHITE}, generating normal black-on-white barcodes. */

public LogoConfig()

{

this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);

}

public LogoConfig(Color borderColor, int logoPart)

{

this.borderColor = borderColor;

this.logoPart = logoPart;

}

public Color getBorderColor()

{

return borderColor;

}

public int getBorder()

{

return border;

}

public int getLogoPart()

{

return logoPart;

}

}

以上所述是给大家介绍的Java生成二维码可添加logo和文字功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，会及时回复大家的。在此也非常感谢大家对我们网站的支持！

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